package com.atguigu.lease.common.utils;

import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import io.jsonwebtoken.*;
import io.jsonwebtoken.security.Keys;
import io.jsonwebtoken.security.SignatureException;

import javax.crypto.SecretKey;
import java.util.Date;

public class JwtUtil {
    private static long tokenExpiration = 60 * 60 * 100000000L;
    private static SecretKey tokenSignKey = Keys.hmacShaKeyFor("M0PKKI6pYGVWWfDZw90a0lTpGYX1d4AQ".getBytes());

    public static String createToken(Long userId, String username) {
        String jwt = Jwts.builder()
                .setSubject("USER_INFO")
                .setExpiration(new Date(System.currentTimeMillis() + tokenExpiration))
                .claim("userID", userId)
                .claim("username", username)
                .signWith(tokenSignKey, SignatureAlgorithm.HS256)
                .compact();
        return jwt;

    }

    public static Claims parsetoken(String token) {

        if (token == null) {
            throw new LeaseException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        }

        try {
            JwtParser jwtParser = Jwts.parserBuilder()
                    .setSigningKey(tokenSignKey)
                    .build();
            Jws<Claims> claimsJws = jwtParser.parseClaimsJws(token);
            Claims body = claimsJws.getBody();
            return body;
        } catch (ExpiredJwtException e) {
            throw new LeaseException(ResultCodeEnum.TOKEN_EXPIRED);
        } catch (JwtException e) {
            throw new LeaseException(ResultCodeEnum.TOKEN_INVALID);
        }
    }
}
